code: def test_column_from_ephemeral_cupy_try_lose_reference():
      # Try to lose the reference we keep to the ephemeral
      # CuPy array
      a = cudf.Series(cupy.asarray([1, 2, 3]))._column
      a = cudf.core.column.as_column(a)
      b = cupy.asarray([1, 1, 1])  # noqa: F841
      assert_eq(pd.Series([1, 2, 3]), a.to_pandas())
  
      a = cudf.Series(cupy.asarray([1, 2, 3]))._column
      a.name = "b"
      b = cupy.asarray([1, 1, 1])  # noqa: F841
      assert_eq(pd.Series([1, 2, 3]), a.to_pandas())
  
file_path: cudf/python/cudf/cudf/tests/test_cuda_array_interface.py
imports: import types
  from contextlib import ExitStack
  import cupy
  import numpy
  import pandas
  import pytest
  from numba import cuda
  import cudf
  from cudf.core.buffer.spill_manager import get_global_manager
  from cudf.testing._utils import DATETIME_TYPES, NUMERIC_TYPES, assert_eq
label_desc: Use image node_id 6 for calling a global function with example usage: test_column_from_ephemeral_cupy_try_lose_reference() without return types